He tried that, sadly for him no-one wanted to watch them.
The one about the dentist is one of the very few films I've not managed to make it the whole way through, and boy have I watched some crap.In Gervais' defence he didn't write that one, although his acting certainly didn't help.
Ghost Town was actually one of the best films of the year. I know a few people who are not fans who were surprised how good it was. And rather moving as well.
But you wouldn't know that as you only saw part of it.